Safety Warning

DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.

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HOMESERVICE MANUALSCHEVROLET2001CHEVY EXPRESS G2500, VAN PASSENGER EXTENDED, 5.0 MREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 877 (ENGINE CONTROLS - 4.8L, 5.3L, AND 6.0L - REPAIR INSTRUCTIONS)REPAIR INSTRUCTIONSSPARK PLUG REPLACEMENTINSTALLATION PROCEDURE

2001 Chevrolet Chevy Express G2500, Van Passenger Extended, 5.0 M

Installation Procedure

2001 Chevrolet Chevy Express G2500, Van Passenger Extended, 5.0 MSECTION Installation Procedure

WARNING: This page does not describe the selected car, but rather 8 other vehicles, including the 2001 GMC Yukon XL, 2001 GMC Yukon, 2001 GMC Sierra, 2001 GMC Cab & Chassis Sierra, and 2001 Chevrolet Tahoe. However, it is still accessible from the selected car via links, so may be relevant.

Fig 1: View Of Spark Plug And Sparkplug Seat

Courtesy of GENERAL MOTORS COMPANY

Properly position each spark plug washer.
Inspect each spark plug gap. Adjust each plug as needed.
Specification

Spark plug gap: 1.524 mm (0.060 in)
Hand start the spark plugs in the corresponding cylinders.
Refer to Fastener Notice in Cautions and Notices.
Tighten the spark plugs.

Tighten
- For used heads tighten the spark plugs to 15 N.m (11 lb ft).
- For new aluminum heads tighten the spark plugs to 20 N.m (15 lb ft).
- For new iron heads, tighten the spark plugs to 30 N.m (22 lb ft).
Install the spark plug wires. Refer to Spark Plug Wire Replacement .

RENDER: 1.0x

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

• You smell fuel, burning insulation, or see smoke.
• Brakes feel soft, pull hard to one side, or make grinding noises.
• The engine overheats, stalls repeatedly, or misfires under load.
• You are missing required tools, torque specs, or safe lifting equipment.
• You are not confident in the next step or safety outcome.